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Category Web Pwn Reverse Crypto Forensics Misc OSINT Stego Blockchain Hardware Mobile

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Higher weight ≈ harder, more prestigious event.

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Challenge	CTF	Weight	Category	Has
stallmanCrypt #chacha20 #srand-time #prng-seed	SwampCTF 2024	40.40	Reverse	files wu 1
SOP #signal-handler #chacha20	Glacier 2023	24.32	Reverse	files wu 1
ChaCha60 #chacha20 #key-expansion	Glacier 2022	24.32	Crypto	files wu 1
dance #chacha20 #predictable-key	WaniCTF 2024	24.99	Crypto	files wu 1
cloudpass #chacha20 #keystream-reuse #xor	0CTF 2021 Quals	–	Crypto	files wu 1